There are many different ways to make a cake. So it goes for hypertufa.
The main ingredients of cement and sand and then the additions because we want more than vanilla.
From Canadian Gardening:
In a wheelbarrow, combine 17 litres each of vermiculite and peat moss, and 11 litres of portland cement. Add a large handful (about one cup/250 mL) of fibremesh if you are concerned about winter strength. Blend dry ingredients, add 13 litres of water and mix well with your hands (wear rubber gloves). The blend should be thoroughly wet and the consistency of cottage cheese. You may halve this recipe for smaller projects.
Read the complete article here.